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Model infoModelsSnapshot: 15 Oct 2026

Thomson Reuters / Safe Sign legal models

Safe Sign Legal Model Family

Historical family of two proprietary legal language models developed before the Thomson Reuters acquisition.

historicalClosed weightsText generation
Official documentation (opens in a new tab)Reviewed 16 Oct 2026
3 of 17 specification fields collected
Context windowNot collectedAwaiting source review
Maximum outputNot collectedAwaiting source review
Input billingNot collectedThomson Reuters private research
Output billingNot collectedNo inferred price

Specifications

Provider-documented facts. “Not collected” means we have not verified that field yet, not that the feature is unsupported.

Context / input limit
Not collected

No reviewed model-specific inference contract. Unknown is not unsupported.

Maximum input tokens
Not collected

No reviewed model-specific inference contract. Unknown is not unsupported.

Maximum output
Not collected

No reviewed model-specific inference contract. Unknown is not unsupported.

Parameters
Not collected

No reviewed model-specific inference contract. Unknown is not unsupported.

Release date
Not collected

No reviewed model-specific inference contract. Unknown is not unsupported.

Knowledge cutoff
Not collected

No reviewed model-specific inference contract. Unknown is not unsupported.

Tool calling
Not collected

No reviewed model-specific inference contract. Unknown is not unsupported.

Structured output
Not collected

No reviewed model-specific inference contract. Unknown is not unsupported.

Streaming
Not collected

No reviewed model-specific inference contract. Unknown is not unsupported.

Batch processing
Not collected

No reviewed model-specific inference contract. Unknown is not unsupported.

Fine-tuning
Not collected

No reviewed model-specific inference contract. Unknown is not unsupported.

Reasoning
Not collected

No reviewed model-specific inference contract. Unknown is not unsupported.

Context caching
Not collected

No reviewed model-specific inference contract. Unknown is not unsupported.

Base model
Not collected

The two early models are not individually named. The later Thomson backbone does not identify their ancestors.

Architecture
Early domain-specialized legal language models developed through data-centric deep-learning research.Source for Architecture (opens in a new tab)

Exact backbones, sizes and training configurations are not disclosed.

Access & pricing

Prices belong to an endpoint and billing tier. A provider listing does not guarantee access for every account or region.

Thomson Reuters private research

Provider source (opens in a new tab)
API model ID
Not collected

No public standalone model selector established.

Access
Historical private model research. Current customer inference availability and retirement date are not established.
Regions
No model-specific deployment-region contract established from these sources.

Endpoint pricing has not been collected. Check the provider for applicable rates.

Data & enterprise terms

Historical experiment-specific data processing, retention and regional terms were not verified. Current product-wide promises are not backdated to private research.

Caching

Caching can reuse earlier input processing. Availability, lifetime and billing depend on the endpoint. A cache hit still generates a new response.

01 / INITIAL INPUTProcess & retain

The system processes eligible input and retains reusable state.

02 / LATER REQUESTCheck available state

Reuse depends on matching input, session state and the cache policy.

03 / CACHE HITReuse & generate

Reusing state can reduce repeated work. Any charges follow the billing rules below.

Thomson Reuters private research

Not verified

No model-specific inference-cache contract. Product persistence, research caching and customer-data retention are distinct.

How it works
Not collected

No model-specific inference-cache contract. Product persistence, research caching and customer-data retention are distinct.

Minimum reusable input
Not collected

No model-specific inference-cache contract. Product persistence, research caching and customer-data retention are distinct.

Lifetime & refresh
Not collected

No model-specific inference-cache contract. Product persistence, research caching and customer-data retention are distinct.

How to enable it
Not collected

No model-specific inference-cache contract. Product persistence, research caching and customer-data retention are distinct.

Usage fields
Not collected

No model-specific inference-cache contract. Product persistence, research caching and customer-data retention are distinct.

Billing rules
Not collected

No model-specific inference-cache contract. Product persistence, research caching and customer-data retention are distinct.

Limits & data boundaries
Not collected

No model-specific inference-cache contract. Product persistence, research caching and customer-data retention are distinct.

No verified cache rate for this endpoint. An empty rate is not a zero charge.

Caching reviewed 16 Oct 2026

What the measurements say

No benchmark observations have been added for this model. We do not turn a vendor description into a performance score.

Latency and throughput depend on the host, request size, reasoning settings and load. There is no measured speed or global usage figure in this record.

The record behind the model

Why it is included

Acquisition announcement explicitly describes proprietary legal LLM development; the CTO confirms two early models. Public identities and weight releases are not established, so a historical private family is recorded without invented checkpoint names.

Classification evidence (opens in a new tab)

Lifecycle dates

Developer acquired by Thomson Reuters; not a model launch or retirement date21 Aug 2024Source (opens in a new tab)

Sources reviewed